Machine for locating screwheads with respect to drills



Feb. 15, 1949. J, \CARPINELLA 2,462,035

MACHINE FOR LOOATING SCREW HEADS WITH RESPECT TO DRILLS Filed April 12, 1945 llll INVENTOR. Michael J. Garpinella Patented Feb. 15, 1949 UNITED STATES MACHINE FOR LOCATING SCREWHEADS WITH RESPECT TO DRILLS Application April 12, 1945, Serial No. 588,006

3 Claims.

This invention relates heads of screws and similar devices. More particularly, the invention is concerned with machines of this type and kind employing means for locating or positioning the screw or other device with respect to cross drills in the operation of drilling the screws or other devices and in discharging the devices from the machine. Still more particularly, the invention deals with means of the kind defined adapted to care for compara-- to machines for drilling Fig. 2 is a section substantially on the line 2-2 of Fig. 1.

Fig. 3 is a front view looking in the direction of the arrow 3 of Fig. 1 with part of the construction omitted; and

Fig. 4 is a section on the line 4-4 of Fig. 1 on an enlarged scale.

The drilling machine forming the subject matter of this application is generally of the type and kind disclosed in my prior application Ser. No. 568,540; filed December 16, 1944, and now abandoned of which this application constitutes a continuation-in-part. In view of the fact that my present conception is concerned primarily with the feed of the screw or other workpiece into the machine and for positioning the screw head preparatory to the drilling operation, only such parts of the present machine as are necessary to illustrate these changes are shown, as the other details of construction form the subject matter ofthe said prior application and are fully and completely shown therein.

In machines of the type and kind under consideration, the purpose is to drill a screw or other workpiece to provide apertures therein or passages therethrough In illustrating one adaptation of this invention, it is shown for the purpose kind under consideration. In Fig. 1, H and I2 represent the two drills supported in suitable chucks l3 and [4, parts of which are shown, for forming the cross drilling operation, these drills being actuated in the manner more specifically disclosed in the application heretofore referred to.

At I5 is shown the stationary screw or workpiece clamping jaw and it shows the movable jaw, these jaws being suitably apertured to form guides for the drills II and [2, as known in this art.

Arranged upon the table or frame Ill of the machine is a supporting member it including an upstanding or U-shaped frame 18. The lower forward portion of this frame has enlarged bosses or bearings i9, note Fig. 1, in which is arranged a pivot pin 2E for pivotally supporting a swingable bracket 2! therein. The upper end of the bracket 2! has an offset yoke portion 22, to which is pivoted, as seen at 23, a clamping arm 2 The bracket 2| has at its upper end two forwardly directed extensions 25 and 26. These extensions have projecting ears 2'! and 28, note Fig. 3, in which are arranged adjustment screws 2Q and 39 operating upon the face of the frame 18 in controlling the swinging adjustment of the bracket 2i for properly positioning the jaws l5 and It with respect to the drills H and E2. The bracket 2! is held in thedesired adjusted position by a transverse bolt 3% which passes through enlarged apertures 32 in the side members of the frame It and through the bracket, as clearly illustrated in Figs. 2 and 3 of the drawing.

The stationary clamping jaw i5 is secured to the extension 25 by a bolt 33, as clearly seen in Fig. 4 of the drawing, whereas the movable jaw 16 has a dovetailed base it, note Fig. 2, for slidable mounting upon the extension 26, a retainer plate 34 being employed to guide the movable jaw I6, as clearly seen in Fig. 2.

It is clearly seen from a consideration of Figs. 1, 3 and 4 of the drawing that the adjacent surfaces of the extensions 25 and 28 are widely spaced apart to form a channel or passage 35 therebetween which extends the full length of the extensions and opens upwardly, downwardly and outwardly therethrough. This construction provides for the reception of a relatively long screw or workpiece 35, as will clearly appear from a consideration of Fig. 1 of the drawing and facilitates downward movement of the screw by a suitable feed, the gripper fingers of which are illustrated at 31 in Figs. 1, 2 and 3 of the drawing. This feed is so constructed as to iaciltate and are indicated in dotted lines in Fig. 1 of the drawing. 7

Spring pressed ejector pins it and 41 are arranged in the recesses :13 and M to eject the screw or workpiece 36 from the plates when the clamping jaws are separated and the screw or workpiece 36 will, thus, drop by gravity .through the channel or opening into a suitable receptacle not shown. The screw 33 secures the various parts of the stationary jaw to the extension 25, whereas screws are employed for securing the various parts of the movable gripper jaw l6 tothe slide l6, as clearly illustrated in Fig. 4 of the drawing.

The clamping arm 24, beyond the pivot 23, carries. acam plate 43 which is adapted to operate upon a roller d9 supported upon one end of a lever: pivoted to the extension 26, as seen at 5.l. The other endi52 of the lever is coupled with the sliding jaw l6 through the medium of appin 53, note Fig. 4. The sliding jaw 15 comprises, in addition to the plate M], a dovetailed base l6, a yoke-shaped spacing member 5 and a top plate 55. The base, spacin member and plate are held together by the screws 45, as clearly shown in Fig. 4 of the drawing. The yoke-shaped contour of the spacing plate 54 is to receive the end 52 of the lever. It will, thus, be seen that, in swinging the clamping arm 24 upwardly, the cam plate 48 is moved downwardly, thus, swinging the lever 53 onaits pivotz5l to move the clamping jaw it into abutting engagement with the stationary jaw 15 to clamp a screw36 therebetween.

'Normally, arranged outwardly of the jaws l5 and IE and in axial alinement with the screw receiving recesses or apertures of the jaw plates 4| and :42, when the jaws are in closed position, is a spindle carries a blade 69 adapted to engage the screw driver slot in the head 38 of the crew.

In Fig. 1 of the drawing, I have shown at 8! a part of a rack operatively engaging the pinion 5S and movable transversely with respect to the axis of said pinion in order to rotate the sp ndle to bring the screw driver slot of the head 38 in proper position with respect to the axis of the drills II and I2. As in the application heretofore referred to. the pinion and spindle 5! are advanced in the direction of the screw head when the clamping jaws have enga ed the head of the screw so as to bring the blade Bil into engagement with the slot of the head 38 as the spindle is rotated and this operation continues until the spindle is brou ht to a stop properlv pos tioning or orienting the head 38 between said drills. At this particular moment, a final operation mav be performed on the clamping arm 24 to effect a final squeeze or clamping engagement upon the screw during the drilling operation.

,In-the above description operation of engaging the screw, it will be understood that the feed fingers 3] are released from the screw and th support or arm .62 carrying the fin ers is moved inwardly to a ain pickup and deliver .the next successive screw to the drilling position. These latter operations are performed during the drilling operation of the screw supported in the clamping jaws. It will be apparent that the machine is entirely automatic in operation and the operation of intermittent delivery of screws to the clamping position, the 'clamping of -the screws and then drilling the same is repeated; the spindle 51 being intermittently moved toward and from the clamping jaws in these intermittent operations.

From a consideration of Fig. 1 of the drawing, it will appear that the jaws l5 and 16 have clearances for the grippers 31 to allow removal of the grippers when the jaws or the plates 4| and 42 are in abutting relationship,

Considering Figs. 1 and 2 of the drawing, it will appear that a spring 63 is employed'for supporting the roller 49 in constant engagement with the cam plate 48 and to move the 'j aw l6 into open position. The spring has one end atachedto a fixedlpost 54 and to a post 55 screwed to the lever 50. r

Having fully described my invention, Wh?.,t1I claim as new and desire to secure by Letters Patent is:

1. In a cross-drilling machine employingra pair of drills arranged in common al-inement and movable toward and from each other for drilling a workpiece disposed in the path of movement of said drills, a pair of workpiece clamping jaws, one of said jaws being fixed, the other jaw being slidably mounted to move toward and from the fixed'jaw, both jaws having axially alined drill receiving apertures, means for automatically delivering a workpiece into position between the apertured portions of said jaws,'means engaging the workpiece :arranged between the jaws to rotate the same into predetermined stop position, spaced supports for .said jaws, the spacing -of said supports providing a channel beneath said jaws through whicha workpiece held iin isaid jaws is adapted to fall by gravity when said laws are separated, and means in the jaw members for ejecting the workpiece therefrom when said jaws are separated.

.2. In maehinesfor drilling workpieces, a fixed jaw, a sliding jaw movable toward and from the first jaw, said jaws having alined sockets for reception-pf :a'workpieceto be supported thereby, the jaws having alined apertures opening into the jaw sockets for reception of drills for drilling that part of a workpiece'disposed in r gistering position with the apertures of said jaws, means forautomatically delivering a workpiece into position between the jaws when in open position, said jaws having supports, the laws including the supports forming channels therebetween when thejaws are in open position for gravity discharge ofa drilled workpiecetherethrough, means engaging a workpiece supported in the jaws for rotating the same to predetermined alinement between the apertures .of said jaws, and means for freeing the drilled workpiece from the jaw sockets upon separation of said jaws.

3. In machines for cross-drilling workpieces, a fixed jaw. a movable jaw having'rectilinear movement toward and from the fixed jaw. said jaws having supports, means providing an elongated channel between the supports and'said Jaws for receiving elongated workpieces to be drilled in said jaws, said jaws having workpiecesreceiving sockets on adjacent surfaces thereof. means for automatically delivering elongated workpieces into registering position with -the REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,816,225 Kamphausen 'July 28, 1931 2,004,540 Smith et al June 11, 1935 0 2,369,869 Testo Feb. 20, 1945 2,390,420 Burke Dec. 4, 1945 

